Diesel Fuel Leaking Rear of engine but not from injector fuel lines?

[PALLEN Lurker Find all posts View Profile Close PALLEN]

Hi All, The saga continues with my Prado Diesel, after engine rebuild, injector issues and turbo failure, I now have a light diesel fuel leak which is coming from the top rear of the engine and dripping slowly down the passenger side bell housing. Have removed the intercooler and cannot see any leakage from the fuel injector lines. There is another line that runs next to the rear injector fuel line and disappears down next to the firewall to where and what I am trying to figure out. I suspect that it may be from where the leak is coming from.
I have not found a straight forward drawing explaining all the items involved in the fuel line and where I think the leak is coming from is of course the least accessible area.
Any thoughts, tips or am I off for another expensive riide.

[ptommo59 Senior Member Find all posts View Profile Close ptommo59]

Hi Pallen,

A couple of photos of what you are describing may be helpful to assist locating what your looking at and potential causes of the leak in that area.

[ptommo59 Senior Member Find all posts View Profile Close ptommo59]

Speculator, but as its not on the high pressure side is it the injector nozzle fuel return line that your looking at?

This has a banjo bolt that could leak if the washer is missing/damaged or not tightened to specification.

See 2377030080 PIPE ASSY, NOZZLE LEAKAGE, NO.2, 9043010028 (BANJO BOLT WASHER) and 9040110067 (BANJO BOLT) in this link to see if it matches INJECTION NOZZLE | Toyota LAND CRUISER PRADO KDJ120R-GKAEYQ 08.2006 - 08.2009 | Parts Catalogs | PartSouq

[PALLEN Lurker Find all posts View Profile Close PALLEN]

Yes it is the fuel return line , thanks ptommo59 for the diagram and seemed like the leak was around the area of the banjo bolt. couldnt see how to access that area with any reasonable visbility. Looks like a 14mm bolt but getting onto it with out pulling the top down is abit of a challenge.

[ptommo59 Senior Member Find all posts View Profile Close ptommo59]

There are a few videos on Youtube that may help with how best to access and torque specs.

There was another post on here where the dampening bracket on the pipe was not refitted possibly during an injector change and allowed the pipe to vibrate to the point it cracked so may be worth checking yours is in place and tightened as well as the banjo bolt 1KD-FTV fuel rail return line failure - Toyota Prado How To's, Technical Information & Reviews (pradopoint.com.au)

[PALLEN Lurker Find all posts View Profile Close PALLEN]

Ok , looks like there was a bit of a leak from one of the fuel line connection which we nipped up a bit and seems to have stopped the suspected leak. Not totally convinced yet.
Driving home engine light has come on again with a P0400 code (exhaust gas recirculation flow).
Any idea what is a regular cause of this code coming up?

[ptommo59 Senior Member Find all posts View Profile Close ptommo59]

Watch this video which has very good info on diagnosis of the P0400 - P0400 Toyota Prado150 - YouTube

This one has a common easy fix fault that can trigger the code P0400 egr Low flow - YouTube and he has a few more on the topic that may be of interest if that wasn't your problem that may be worth a look like MORE P0400 and EGR INFO - YouTube.

[ptommo59 Senior Member Find all posts View Profile Close ptommo59]

The tip in the third video is the most likely in your case as you have been working on the rear of the engine and could have dislodged one of the vacuum pipes or damaged the control valve that operates the EGR or Bypass Valves. See if you can hear or feel any sucking air around the area you were working in.

[PALLEN Lurker Find all posts View Profile Close PALLEN]

Thanks I will check that as well as the wiring